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1// SPDX-License-Identifier: GPL-2.0-or-later
2/* Geode LX framebuffer driver
3 *
4 * Copyright (C) 2006-2007, Advanced Micro Devices,Inc.
5 */
6
7#include <linux/kernel.h>
8#include <linux/errno.h>
9#include <linux/fb.h>
10#include <linux/uaccess.h>
11#include <linux/delay.h>
12#include <linux/cs5535.h>
13
14#include <asm/msr.h>
15#include "lxfb.h"
16
17/* TODO
18 * Support panel scaling
19 * Add acceleration
20 * Add support for interlacing (TV out)
21 * Support compression
22 */
23
24/* This is the complete list of PLL frequencies that we can set -
25 * we will choose the closest match to the incoming clock.
26 * freq is the frequency of the dotclock * 1000 (for example,
27 * 24823 = 24.983 Mhz).
28 * pllval is the corresponding PLL value
29*/
30
31static const struct {
32 unsigned int pllval;
33 unsigned int freq;
34} pll_table[] = {
35 { 0x000131AC, 6231 },
36 { 0x0001215D, 6294 },
37 { 0x00011087, 6750 },
38 { 0x0001216C, 7081 },
39 { 0x0001218D, 7140 },
40 { 0x000110C9, 7800 },
41 { 0x00013147, 7875 },
42 { 0x000110A7, 8258 },
43 { 0x00012159, 8778 },
44 { 0x00014249, 8875 },
45 { 0x00010057, 9000 },
46 { 0x0001219A, 9472 },
47 { 0x00012158, 9792 },
48 { 0x00010045, 10000 },
49 { 0x00010089, 10791 },
50 { 0x000110E7, 11225 },
51 { 0x00012136, 11430 },
52 { 0x00013207, 12375 },
53 { 0x00012187, 12500 },
54 { 0x00014286, 14063 },
55 { 0x000110E5, 15016 },
56 { 0x00014214, 16250 },
57 { 0x00011105, 17045 },
58 { 0x000131E4, 18563 },
59 { 0x00013183, 18750 },
60 { 0x00014284, 19688 },
61 { 0x00011104, 20400 },
62 { 0x00016363, 23625 },
63 { 0x000031AC, 24923 },
64 { 0x0000215D, 25175 },
65 { 0x00001087, 27000 },
66 { 0x0000216C, 28322 },
67 { 0x0000218D, 28560 },
68 { 0x000010C9, 31200 },
69 { 0x00003147, 31500 },
70 { 0x000010A7, 33032 },
71 { 0x00002159, 35112 },
72 { 0x00004249, 35500 },
73 { 0x00000057, 36000 },
74 { 0x0000219A, 37889 },
75 { 0x00002158, 39168 },
76 { 0x00000045, 40000 },
77 { 0x00000089, 43163 },
78 { 0x000010E7, 44900 },
79 { 0x00002136, 45720 },
80 { 0x00003207, 49500 },
81 { 0x00002187, 50000 },
82 { 0x00004286, 56250 },
83 { 0x000010E5, 60065 },
84 { 0x00004214, 65000 },
85 { 0x00001105, 68179 },
86 { 0x000031E4, 74250 },
87 { 0x00003183, 75000 },
88 { 0x00004284, 78750 },
89 { 0x00001104, 81600 },
90 { 0x00006363, 94500 },
91 { 0x00005303, 97520 },
92 { 0x00002183, 100187 },
93 { 0x00002122, 101420 },
94 { 0x00001081, 108000 },
95 { 0x00006201, 113310 },
96 { 0x00000041, 119650 },
97 { 0x000041A1, 129600 },
98 { 0x00002182, 133500 },
99 { 0x000041B1, 135000 },
100 { 0x00000051, 144000 },
101 { 0x000041E1, 148500 },
102 { 0x000062D1, 157500 },
103 { 0x000031A1, 162000 },
104 { 0x00000061, 169203 },
105 { 0x00004231, 172800 },
106 { 0x00002151, 175500 },
107 { 0x000052E1, 189000 },
108 { 0x00000071, 192000 },
109 { 0x00003201, 198000 },
110 { 0x00004291, 202500 },
111 { 0x00001101, 204750 },
112 { 0x00007481, 218250 },
113 { 0x00004170, 229500 },
114 { 0x00006210, 234000 },
115 { 0x00003140, 251182 },
116 { 0x00006250, 261000 },
117 { 0x000041C0, 278400 },
118 { 0x00005220, 280640 },
119 { 0x00000050, 288000 },
120 { 0x000041E0, 297000 },
121 { 0x00002130, 320207 }
122};
123
124
125static void lx_set_dotpll(u32 pllval)
126{
127 u32 dotpll_lo, dotpll_hi;
128 int i;
129
130 rdmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
131
132 if ((dotpll_lo & MSR_GLCP_DOTPLL_LOCK) && (dotpll_hi == pllval))
133 return;
134
135 dotpll_hi = pllval;
136 dotpll_lo &= ~(MSR_GLCP_DOTPLL_BYPASS | MSR_GLCP_DOTPLL_HALFPIX);
137 dotpll_lo |= MSR_GLCP_DOTPLL_DOTRESET;
138
139 wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
140
141 /* Wait 100us for the PLL to lock */
142
143 udelay(100);
144
145 /* Now, loop for the lock bit */
146
147 for (i = 0; i < 1000; i++) {
148 rdmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
149 if (dotpll_lo & MSR_GLCP_DOTPLL_LOCK)
150 break;
151 }
152
153 /* Clear the reset bit */
154
155 dotpll_lo &= ~MSR_GLCP_DOTPLL_DOTRESET;
156 wrmsr(MSR_GLCP_DOTPLL, dotpll_lo, dotpll_hi);
157}
158
159/* Set the clock based on the frequency specified by the current mode */
160
161static void lx_set_clock(struct fb_info *info)
162{
163 unsigned int diff, min, best = 0;
164 unsigned int freq, i;
165
166 freq = (unsigned int) (1000000000 / info->var.pixclock);
167
168 min = abs(pll_table[0].freq - freq);
169
170 for (i = 0; i < ARRAY_SIZE(pll_table); i++) {
171 diff = abs(pll_table[i].freq - freq);
172 if (diff < min) {
173 min = diff;
174 best = i;
175 }
176 }
177
178 lx_set_dotpll(pll_table[best].pllval & 0x00017FFF);
179}
180
181static void lx_graphics_disable(struct fb_info *info)
182{
183 struct lxfb_par *par = info->par;
184 unsigned int val, gcfg;
185
186 /* Note: This assumes that the video is in a quitet state */
187
188 write_vp(par, VP_A1T, 0);
189 write_vp(par, VP_A2T, 0);
190 write_vp(par, VP_A3T, 0);
191
192 /* Turn off the VGA and video enable */
193 val = read_dc(par, DC_GENERAL_CFG) & ~(DC_GENERAL_CFG_VGAE |
194 DC_GENERAL_CFG_VIDE);
195
196 write_dc(par, DC_GENERAL_CFG, val);
197
198 val = read_vp(par, VP_VCFG) & ~VP_VCFG_VID_EN;
199 write_vp(par, VP_VCFG, val);
200
201 write_dc(par, DC_IRQ, DC_IRQ_MASK | DC_IRQ_VIP_VSYNC_LOSS_IRQ_MASK |
202 DC_IRQ_STATUS | DC_IRQ_VIP_VSYNC_IRQ_STATUS);
203
204 val = read_dc(par, DC_GENLK_CTL) & ~DC_GENLK_CTL_GENLK_EN;
205 write_dc(par, DC_GENLK_CTL, val);
206
207 val = read_dc(par, DC_CLR_KEY);
208 write_dc(par, DC_CLR_KEY, val & ~DC_CLR_KEY_CLR_KEY_EN);
209
210 /* turn off the panel */
211 write_fp(par, FP_PM, read_fp(par, FP_PM) & ~FP_PM_P);
212
213 val = read_vp(par, VP_MISC) | VP_MISC_DACPWRDN;
214 write_vp(par, VP_MISC, val);
215
216 /* Turn off the display */
217
218 val = read_vp(par, VP_DCFG);
219 write_vp(par, VP_DCFG, val & ~(VP_DCFG_CRT_EN | VP_DCFG_HSYNC_EN |
220 VP_DCFG_VSYNC_EN | VP_DCFG_DAC_BL_EN));
221
222 gcfg = read_dc(par, DC_GENERAL_CFG);
223 gcfg &= ~(DC_GENERAL_CFG_CMPE | DC_GENERAL_CFG_DECE);
224 write_dc(par, DC_GENERAL_CFG, gcfg);
225
226 /* Turn off the TGEN */
227 val = read_dc(par, DC_DISPLAY_CFG);
228 val &= ~DC_DISPLAY_CFG_TGEN;
229 write_dc(par, DC_DISPLAY_CFG, val);
230
231 /* Wait 1000 usecs to ensure that the TGEN is clear */
232 udelay(1000);
233
234 /* Turn off the FIFO loader */
235
236 gcfg &= ~DC_GENERAL_CFG_DFLE;
237 write_dc(par, DC_GENERAL_CFG, gcfg);
238
239 /* Lastly, wait for the GP to go idle */
240
241 do {
242 val = read_gp(par, GP_BLT_STATUS);
243 } while ((val & GP_BLT_STATUS_PB) || !(val & GP_BLT_STATUS_CE));
244}
245
246static void lx_graphics_enable(struct fb_info *info)
247{
248 struct lxfb_par *par = info->par;
249 u32 temp, config;
250
251 /* Set the video request register */
252 write_vp(par, VP_VRR, 0);
253
254 /* Set up the polarities */
255
256 config = read_vp(par, VP_DCFG);
257
258 config &= ~(VP_DCFG_CRT_SYNC_SKW | VP_DCFG_PWR_SEQ_DELAY |
259 VP_DCFG_CRT_HSYNC_POL | VP_DCFG_CRT_VSYNC_POL);
260
261 config |= (VP_DCFG_CRT_SYNC_SKW_DEFAULT | VP_DCFG_PWR_SEQ_DELAY_DEFAULT
262 | VP_DCFG_GV_GAM);
263
264 if (info->var.sync & FB_SYNC_HOR_HIGH_ACT)
265 config |= VP_DCFG_CRT_HSYNC_POL;
266
267 if (info->var.sync & FB_SYNC_VERT_HIGH_ACT)
268 config |= VP_DCFG_CRT_VSYNC_POL;
269
270 if (par->output & OUTPUT_PANEL) {
271 u32 msrlo, msrhi;
272
273 write_fp(par, FP_PT1, 0);
274 temp = FP_PT2_SCRC;
275
276 if (!(info->var.sync & FB_SYNC_HOR_HIGH_ACT))
277 temp |= FP_PT2_HSP;
278
279 if (!(info->var.sync & FB_SYNC_VERT_HIGH_ACT))
280 temp |= FP_PT2_VSP;
281
282 write_fp(par, FP_PT2, temp);
283 write_fp(par, FP_DFC, FP_DFC_BC);
284
285 msrlo = MSR_LX_MSR_PADSEL_TFT_SEL_LOW;
286 msrhi = MSR_LX_MSR_PADSEL_TFT_SEL_HIGH;
287
288 wrmsr(MSR_LX_MSR_PADSEL, msrlo, msrhi);
289 }
290
291 if (par->output & OUTPUT_CRT) {
292 config |= VP_DCFG_CRT_EN | VP_DCFG_HSYNC_EN |
293 VP_DCFG_VSYNC_EN | VP_DCFG_DAC_BL_EN;
294 }
295
296 write_vp(par, VP_DCFG, config);
297
298 /* Turn the CRT dacs back on */
299
300 if (par->output & OUTPUT_CRT) {
301 temp = read_vp(par, VP_MISC);
302 temp &= ~(VP_MISC_DACPWRDN | VP_MISC_APWRDN);
303 write_vp(par, VP_MISC, temp);
304 }
305
306 /* Turn the panel on (if it isn't already) */
307 if (par->output & OUTPUT_PANEL)
308 write_fp(par, FP_PM, read_fp(par, FP_PM) | FP_PM_P);
309}
310
311unsigned int lx_framebuffer_size(void)
312{
313 unsigned int val;
314
315 if (!cs5535_has_vsa2()) {
316 uint32_t hi, lo;
317
318 /* The number of pages is (PMAX - PMIN)+1 */
319 rdmsr(MSR_GLIU_P2D_RO0, lo, hi);
320
321 /* PMAX */
322 val = ((hi & 0xff) << 12) | ((lo & 0xfff00000) >> 20);
323 /* PMIN */
324 val -= (lo & 0x000fffff);
325 val += 1;
326
327 /* The page size is 4k */
328 return (val << 12);
329 }
330
331 /* The frame buffer size is reported by a VSM in VSA II */
332 /* Virtual Register Class = 0x02 */
333 /* VG_MEM_SIZE (1MB units) = 0x00 */
334
335 outw(VSA_VR_UNLOCK, VSA_VRC_INDEX);
336 outw(VSA_VR_MEM_SIZE, VSA_VRC_INDEX);
337
338 val = (unsigned int)(inw(VSA_VRC_DATA)) & 0xFE;
339 return (val << 20);
340}
341
342void lx_set_mode(struct fb_info *info)
343{
344 struct lxfb_par *par = info->par;
345 u64 msrval;
346
347 unsigned int max, dv, val, size;
348
349 unsigned int gcfg, dcfg;
350 int hactive, hblankstart, hsyncstart, hsyncend, hblankend, htotal;
351 int vactive, vblankstart, vsyncstart, vsyncend, vblankend, vtotal;
352
353 /* Unlock the DC registers */
354 write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
355
356 lx_graphics_disable(info);
357
358 lx_set_clock(info);
359
360 /* Set output mode */
361
362 rdmsrq(MSR_LX_GLD_MSR_CONFIG, msrval);
363 msrval &= ~MSR_LX_GLD_MSR_CONFIG_FMT;
364
365 if (par->output & OUTPUT_PANEL) {
366 msrval |= MSR_LX_GLD_MSR_CONFIG_FMT_FP;
367
368 if (par->output & OUTPUT_CRT)
369 msrval |= MSR_LX_GLD_MSR_CONFIG_FPC;
370 else
371 msrval &= ~MSR_LX_GLD_MSR_CONFIG_FPC;
372 } else
373 msrval |= MSR_LX_GLD_MSR_CONFIG_FMT_CRT;
374
375 wrmsrq(MSR_LX_GLD_MSR_CONFIG, msrval);
376
377 /* Clear the various buffers */
378 /* FIXME: Adjust for panning here */
379
380 write_dc(par, DC_FB_ST_OFFSET, 0);
381 write_dc(par, DC_CB_ST_OFFSET, 0);
382 write_dc(par, DC_CURS_ST_OFFSET, 0);
383
384 /* FIXME: Add support for interlacing */
385 /* FIXME: Add support for scaling */
386
387 val = read_dc(par, DC_GENLK_CTL);
388 val &= ~(DC_GENLK_CTL_ALPHA_FLICK_EN | DC_GENLK_CTL_FLICK_EN |
389 DC_GENLK_CTL_FLICK_SEL_MASK);
390
391 /* Default scaling params */
392
393 write_dc(par, DC_GFX_SCALE, (0x4000 << 16) | 0x4000);
394 write_dc(par, DC_IRQ_FILT_CTL, 0);
395 write_dc(par, DC_GENLK_CTL, val);
396
397 /* FIXME: Support compression */
398
399 if (info->fix.line_length > 4096)
400 dv = DC_DV_CTL_DV_LINE_SIZE_8K;
401 else if (info->fix.line_length > 2048)
402 dv = DC_DV_CTL_DV_LINE_SIZE_4K;
403 else if (info->fix.line_length > 1024)
404 dv = DC_DV_CTL_DV_LINE_SIZE_2K;
405 else
406 dv = DC_DV_CTL_DV_LINE_SIZE_1K;
407
408 max = info->fix.line_length * info->var.yres;
409 max = (max + 0x3FF) & 0xFFFFFC00;
410
411 write_dc(par, DC_DV_TOP, max | DC_DV_TOP_DV_TOP_EN);
412
413 val = read_dc(par, DC_DV_CTL) & ~DC_DV_CTL_DV_LINE_SIZE;
414 write_dc(par, DC_DV_CTL, val | dv);
415
416 size = info->var.xres * (info->var.bits_per_pixel >> 3);
417
418 write_dc(par, DC_GFX_PITCH, info->fix.line_length >> 3);
419 write_dc(par, DC_LINE_SIZE, (size + 7) >> 3);
420
421 /* Set default watermark values */
422
423 rdmsrq(MSR_LX_SPARE_MSR, msrval);
424
425 msrval &= ~(MSR_LX_SPARE_MSR_DIS_CFIFO_HGO
426 | MSR_LX_SPARE_MSR_VFIFO_ARB_SEL
427 | MSR_LX_SPARE_MSR_LOAD_WM_LPEN_M
428 | MSR_LX_SPARE_MSR_WM_LPEN_OVRD);
429 msrval |= MSR_LX_SPARE_MSR_DIS_VIFO_WM |
430 MSR_LX_SPARE_MSR_DIS_INIT_V_PRI;
431 wrmsrq(MSR_LX_SPARE_MSR, msrval);
432
433 gcfg = DC_GENERAL_CFG_DFLE; /* Display fifo enable */
434 gcfg |= (0x6 << DC_GENERAL_CFG_DFHPSL_SHIFT) | /* default priority */
435 (0xb << DC_GENERAL_CFG_DFHPEL_SHIFT);
436 gcfg |= DC_GENERAL_CFG_FDTY; /* Set the frame dirty mode */
437
438 dcfg = DC_DISPLAY_CFG_VDEN; /* Enable video data */
439 dcfg |= DC_DISPLAY_CFG_GDEN; /* Enable graphics */
440 dcfg |= DC_DISPLAY_CFG_TGEN; /* Turn on the timing generator */
441 dcfg |= DC_DISPLAY_CFG_TRUP; /* Update timings immediately */
442 dcfg |= DC_DISPLAY_CFG_PALB; /* Palette bypass in > 8 bpp modes */
443 dcfg |= DC_DISPLAY_CFG_VISL;
444 dcfg |= DC_DISPLAY_CFG_DCEN; /* Always center the display */
445
446 /* Set the current BPP mode */
447
448 switch (info->var.bits_per_pixel) {
449 case 8:
450 dcfg |= DC_DISPLAY_CFG_DISP_MODE_8BPP;
451 break;
452
453 case 16:
454 dcfg |= DC_DISPLAY_CFG_DISP_MODE_16BPP;
455 break;
456
457 case 32:
458 case 24:
459 dcfg |= DC_DISPLAY_CFG_DISP_MODE_24BPP;
460 break;
461 }
462
463 /* Now - set up the timings */
464
465 hactive = info->var.xres;
466 hblankstart = hactive;
467 hsyncstart = hblankstart + info->var.right_margin;
468 hsyncend = hsyncstart + info->var.hsync_len;
469 hblankend = hsyncend + info->var.left_margin;
470 htotal = hblankend;
471
472 vactive = info->var.yres;
473 vblankstart = vactive;
474 vsyncstart = vblankstart + info->var.lower_margin;
475 vsyncend = vsyncstart + info->var.vsync_len;
476 vblankend = vsyncend + info->var.upper_margin;
477 vtotal = vblankend;
478
479 write_dc(par, DC_H_ACTIVE_TIMING, (hactive - 1) | ((htotal - 1) << 16));
480 write_dc(par, DC_H_BLANK_TIMING,
481 (hblankstart - 1) | ((hblankend - 1) << 16));
482 write_dc(par, DC_H_SYNC_TIMING,
483 (hsyncstart - 1) | ((hsyncend - 1) << 16));
484
485 write_dc(par, DC_V_ACTIVE_TIMING, (vactive - 1) | ((vtotal - 1) << 16));
486 write_dc(par, DC_V_BLANK_TIMING,
487 (vblankstart - 1) | ((vblankend - 1) << 16));
488 write_dc(par, DC_V_SYNC_TIMING,
489 (vsyncstart - 1) | ((vsyncend - 1) << 16));
490
491 write_dc(par, DC_FB_ACTIVE,
492 (info->var.xres - 1) << 16 | (info->var.yres - 1));
493
494 /* And re-enable the graphics output */
495 lx_graphics_enable(info);
496
497 /* Write the two main configuration registers */
498 write_dc(par, DC_DISPLAY_CFG, dcfg);
499 write_dc(par, DC_ARB_CFG, 0);
500 write_dc(par, DC_GENERAL_CFG, gcfg);
501
502 /* Lock the DC registers */
503 write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
504}
505
506void lx_set_palette_reg(struct fb_info *info, unsigned regno,
507 unsigned red, unsigned green, unsigned blue)
508{
509 struct lxfb_par *par = info->par;
510 int val;
511
512 /* Hardware palette is in RGB 8-8-8 format. */
513
514 val = (red << 8) & 0xff0000;
515 val |= (green) & 0x00ff00;
516 val |= (blue >> 8) & 0x0000ff;
517
518 write_dc(par, DC_PAL_ADDRESS, regno);
519 write_dc(par, DC_PAL_DATA, val);
520}
521
522int lx_blank_display(struct fb_info *info, int blank_mode)
523{
524 struct lxfb_par *par = info->par;
525 u32 dcfg, misc, fp_pm;
526 int blank, hsync, vsync;
527
528 /* CRT power saving modes. */
529 switch (blank_mode) {
530 case FB_BLANK_UNBLANK:
531 blank = 0; hsync = 1; vsync = 1;
532 break;
533 case FB_BLANK_NORMAL:
534 blank = 1; hsync = 1; vsync = 1;
535 break;
536 case FB_BLANK_VSYNC_SUSPEND:
537 blank = 1; hsync = 1; vsync = 0;
538 break;
539 case FB_BLANK_HSYNC_SUSPEND:
540 blank = 1; hsync = 0; vsync = 1;
541 break;
542 case FB_BLANK_POWERDOWN:
543 blank = 1; hsync = 0; vsync = 0;
544 break;
545 default:
546 return -EINVAL;
547 }
548
549 dcfg = read_vp(par, VP_DCFG);
550 dcfg &= ~(VP_DCFG_DAC_BL_EN | VP_DCFG_HSYNC_EN | VP_DCFG_VSYNC_EN |
551 VP_DCFG_CRT_EN);
552 if (!blank)
553 dcfg |= VP_DCFG_DAC_BL_EN | VP_DCFG_CRT_EN;
554 if (hsync)
555 dcfg |= VP_DCFG_HSYNC_EN;
556 if (vsync)
557 dcfg |= VP_DCFG_VSYNC_EN;
558
559 write_vp(par, VP_DCFG, dcfg);
560
561 misc = read_vp(par, VP_MISC);
562
563 if (vsync && hsync)
564 misc &= ~VP_MISC_DACPWRDN;
565 else
566 misc |= VP_MISC_DACPWRDN;
567
568 write_vp(par, VP_MISC, misc);
569
570 /* Power on/off flat panel */
571
572 if (par->output & OUTPUT_PANEL) {
573 fp_pm = read_fp(par, FP_PM);
574 if (blank_mode == FB_BLANK_POWERDOWN)
575 fp_pm &= ~FP_PM_P;
576 else
577 fp_pm |= FP_PM_P;
578 write_fp(par, FP_PM, fp_pm);
579 }
580
581 return 0;
582}
583
584static void lx_save_regs(struct lxfb_par *par)
585{
586 uint32_t filt;
587 int i;
588
589 /* wait for the BLT engine to stop being busy */
590 do {
591 i = read_gp(par, GP_BLT_STATUS);
592 } while ((i & GP_BLT_STATUS_PB) || !(i & GP_BLT_STATUS_CE));
593
594 /* save MSRs */
595 rdmsrq(MSR_LX_MSR_PADSEL, par->msr.padsel);
596 rdmsrq(MSR_GLCP_DOTPLL, par->msr.dotpll);
597 rdmsrq(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg);
598 rdmsrq(MSR_LX_SPARE_MSR, par->msr.dcspare);
599
600 write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
601
602 /* save registers */
603 memcpy(par->gp, par->gp_regs, sizeof(par->gp));
604 memcpy(par->dc, par->dc_regs, sizeof(par->dc));
605 memcpy(par->vp, par->vp_regs, sizeof(par->vp));
606 memcpy(par->fp, par->vp_regs + VP_FP_START, sizeof(par->fp));
607
608 /* save the display controller palette */
609 write_dc(par, DC_PAL_ADDRESS, 0);
610 for (i = 0; i < ARRAY_SIZE(par->dc_pal); i++)
611 par->dc_pal[i] = read_dc(par, DC_PAL_DATA);
612
613 /* save the video processor palette */
614 write_vp(par, VP_PAR, 0);
615 for (i = 0; i < ARRAY_SIZE(par->vp_pal); i++)
616 par->vp_pal[i] = read_vp(par, VP_PDR);
617
618 /* save the horizontal filter coefficients */
619 filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL;
620 for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) {
621 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
622 par->hcoeff[i] = read_dc(par, DC_FILT_COEFF1);
623 par->hcoeff[i + 1] = read_dc(par, DC_FILT_COEFF2);
624 }
625
626 /* save the vertical filter coefficients */
627 filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL;
628 for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) {
629 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
630 par->vcoeff[i] = read_dc(par, DC_FILT_COEFF1);
631 }
632
633 /* save video coeff ram */
634 memcpy(par->vp_coeff, par->vp_regs + VP_VCR, sizeof(par->vp_coeff));
635}
636
637static void lx_restore_gfx_proc(struct lxfb_par *par)
638{
639 int i;
640
641 /* a bunch of registers require GP_RASTER_MODE to be set first */
642 write_gp(par, GP_RASTER_MODE, par->gp[GP_RASTER_MODE]);
643
644 for (i = 0; i < ARRAY_SIZE(par->gp); i++) {
645 switch (i) {
646 case GP_RASTER_MODE:
647 case GP_VECTOR_MODE:
648 case GP_BLT_MODE:
649 case GP_BLT_STATUS:
650 case GP_HST_SRC:
651 /* FIXME: restore LUT data */
652 case GP_LUT_INDEX:
653 case GP_LUT_DATA:
654 /* don't restore these registers */
655 break;
656
657 default:
658 write_gp(par, i, par->gp[i]);
659 }
660 }
661}
662
663static void lx_restore_display_ctlr(struct lxfb_par *par)
664{
665 uint32_t filt;
666 int i;
667
668 wrmsrq(MSR_LX_SPARE_MSR, par->msr.dcspare);
669
670 for (i = 0; i < ARRAY_SIZE(par->dc); i++) {
671 switch (i) {
672 case DC_UNLOCK:
673 /* unlock the DC; runs first */
674 write_dc(par, DC_UNLOCK, DC_UNLOCK_UNLOCK);
675 break;
676
677 case DC_GENERAL_CFG:
678 case DC_DISPLAY_CFG:
679 /* disable all while restoring */
680 write_dc(par, i, 0);
681 break;
682
683 case DC_DV_CTL:
684 /* set all ram to dirty */
685 write_dc(par, i, par->dc[i] | DC_DV_CTL_CLEAR_DV_RAM);
686 break;
687
688 case DC_RSVD_1:
689 case DC_RSVD_2:
690 case DC_RSVD_3:
691 case DC_LINE_CNT:
692 case DC_PAL_ADDRESS:
693 case DC_PAL_DATA:
694 case DC_DFIFO_DIAG:
695 case DC_CFIFO_DIAG:
696 case DC_FILT_COEFF1:
697 case DC_FILT_COEFF2:
698 case DC_RSVD_4:
699 case DC_RSVD_5:
700 /* don't restore these registers */
701 break;
702
703 default:
704 write_dc(par, i, par->dc[i]);
705 }
706 }
707
708 /* restore the palette */
709 write_dc(par, DC_PAL_ADDRESS, 0);
710 for (i = 0; i < ARRAY_SIZE(par->dc_pal); i++)
711 write_dc(par, DC_PAL_DATA, par->dc_pal[i]);
712
713 /* restore the horizontal filter coefficients */
714 filt = par->dc[DC_IRQ_FILT_CTL] | DC_IRQ_FILT_CTL_H_FILT_SEL;
715 for (i = 0; i < ARRAY_SIZE(par->hcoeff); i += 2) {
716 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
717 write_dc(par, DC_FILT_COEFF1, par->hcoeff[i]);
718 write_dc(par, DC_FILT_COEFF2, par->hcoeff[i + 1]);
719 }
720
721 /* restore the vertical filter coefficients */
722 filt &= ~DC_IRQ_FILT_CTL_H_FILT_SEL;
723 for (i = 0; i < ARRAY_SIZE(par->vcoeff); i++) {
724 write_dc(par, DC_IRQ_FILT_CTL, (filt & 0xffffff00) | i);
725 write_dc(par, DC_FILT_COEFF1, par->vcoeff[i]);
726 }
727}
728
729static void lx_restore_video_proc(struct lxfb_par *par)
730{
731 int i;
732
733 wrmsrq(MSR_LX_GLD_MSR_CONFIG, par->msr.dfglcfg);
734 wrmsrq(MSR_LX_MSR_PADSEL, par->msr.padsel);
735
736 for (i = 0; i < ARRAY_SIZE(par->vp); i++) {
737 switch (i) {
738 case VP_VCFG:
739 case VP_DCFG:
740 case VP_PAR:
741 case VP_PDR:
742 case VP_CCS:
743 case VP_RSVD_0:
744 /* case VP_VDC: */ /* why should this not be restored? */
745 case VP_RSVD_1:
746 case VP_CRC32:
747 /* don't restore these registers */
748 break;
749
750 default:
751 write_vp(par, i, par->vp[i]);
752 }
753 }
754
755 /* restore video processor palette */
756 write_vp(par, VP_PAR, 0);
757 for (i = 0; i < ARRAY_SIZE(par->vp_pal); i++)
758 write_vp(par, VP_PDR, par->vp_pal[i]);
759
760 /* restore video coeff ram */
761 memcpy(par->vp_regs + VP_VCR, par->vp_coeff, sizeof(par->vp_coeff));
762}
763
764static void lx_restore_regs(struct lxfb_par *par)
765{
766 int i;
767
768 lx_set_dotpll((u32) (par->msr.dotpll >> 32));
769 lx_restore_gfx_proc(par);
770 lx_restore_display_ctlr(par);
771 lx_restore_video_proc(par);
772
773 /* Flat Panel */
774 for (i = 0; i < ARRAY_SIZE(par->fp); i++) {
775 switch (i) {
776 case FP_PM:
777 case FP_RSVD_0:
778 case FP_RSVD_1:
779 case FP_RSVD_2:
780 case FP_RSVD_3:
781 case FP_RSVD_4:
782 /* don't restore these registers */
783 break;
784
785 default:
786 write_fp(par, i, par->fp[i]);
787 }
788 }
789
790 /* control the panel */
791 if (par->fp[FP_PM] & FP_PM_P) {
792 /* power on the panel if not already power{ed,ing} on */
793 if (!(read_fp(par, FP_PM) &
794 (FP_PM_PANEL_ON|FP_PM_PANEL_PWR_UP)))
795 write_fp(par, FP_PM, par->fp[FP_PM]);
796 } else {
797 /* power down the panel if not already power{ed,ing} down */
798 if (!(read_fp(par, FP_PM) &
799 (FP_PM_PANEL_OFF|FP_PM_PANEL_PWR_DOWN)))
800 write_fp(par, FP_PM, par->fp[FP_PM]);
801 }
802
803 /* turn everything on */
804 write_vp(par, VP_VCFG, par->vp[VP_VCFG]);
805 write_vp(par, VP_DCFG, par->vp[VP_DCFG]);
806 write_dc(par, DC_DISPLAY_CFG, par->dc[DC_DISPLAY_CFG]);
807 /* do this last; it will enable the FIFO load */
808 write_dc(par, DC_GENERAL_CFG, par->dc[DC_GENERAL_CFG]);
809
810 /* lock the door behind us */
811 write_dc(par, DC_UNLOCK, DC_UNLOCK_LOCK);
812}
813
814int lx_powerdown(struct fb_info *info)
815{
816 struct lxfb_par *par = info->par;
817
818 if (par->powered_down)
819 return 0;
820
821 lx_save_regs(par);
822 lx_graphics_disable(info);
823
824 par->powered_down = 1;
825 return 0;
826}
827
828int lx_powerup(struct fb_info *info)
829{
830 struct lxfb_par *par = info->par;
831
832 if (!par->powered_down)
833 return 0;
834
835 lx_restore_regs(par);
836
837 par->powered_down = 0;
838 return 0;
839}